Frederick w



(No Model.)

P. W. HEDGELAND.

' EXHAUST FOR REED ORGAN BELLOWS.

No. 505,161. PatentedSept. 19, 1893.

wzffness 43$: Ir-zveno or' & fTEDE/PMK W/lmasm 1w UNITED STATES PATENT()FFIcE.

FREDERICK W. I-IEDGELAND, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE W. WV.KIMBALL COMPANY, OF SAME PLACE.

EXHAUST FOR REED-ORGAN BELLOWS.

SYECIFICATION forming part of Letters Patent No. 505,161, datedSeptember 19, 1893.

Application filed April 5, 1893. Serial No. 469,232. (No model.)

To all whom it may concern.-

Be it known that I, FREDERICK W. HEDGE- LAND, a citizen of the UnitedStates, residing in Chicago, in the county of Cook and State ofIllinois, have invented anew and useful Improvement in Exhausts forReed-Organ Bellows, of which the following is a specification.

In working the treadles of an ordinary reed organ, the stroke becomesharder as the treadles descend. This increase in the amount of powerrequired is very tiresome to the player, because as the amount of powerrequired increases, his own power diminishes, he being able to .putforth less power as his foot approaches the horizontal position. Itresults from this that the working of the treadle is rendered uneven andjerky, and of course the action of the bellows is unfavorably affectedby the uneven actuation of the bellows. I attribute much of thisincrease of power requisite in the lower portion of the pedal stroke tothe construction of the exhauster heretofore employed. In the customarymanner of building the exhauster, it is provided with collapsible sidesusually formed of flexible material and adapted to fold inwardly andlocated between the front and back of the exhauster. These folding sidesresist the opening of the exhauster, which takes place when the treadleis forced down, because of the atmospheric action upon them which tendsto force them inward and to retain them in that position. I have devised a construction by which I obviate most of the resistance thuscaused by the collapsible sides. In this improvement I substitute forthe collapsible sides a sheet of rubber or other impervious material,which is stationarily supported at its edges so as to keep itsubstantially taut and in normal contact with the edge of the movableside of the feeder. With this construction, when the movable side isbeing drawn forward by the pedal the air will so act upon the cloth asto keep it in contact with the edge of the board and prevent any escapeof the air from within the exhauster, so that the chamber of theexhauster as it expands will be filled from the reservoir, while upon areversal or backward movement of the movable side the cloth willbelifted away from the edge of the board and the confined air thus beallowed to escape.

In the accompanying drawing I showa vertical section of the reservoirand exhauster of a suction bellows embodying my present improvement.

In said drawing A represents the treadle, B the flexible connection fromthe treadle to the movable front or board of the exhauster, C the saidmovable front, D the front of the reservoir, d the valved air passagesin said front, E the back of the reservoir, and e the passage throughwhich the air is drawn from the reeds.

F is the customarily employed spring acting to return the movable front0 after it has been drawn forward by the treadle.

G represents a stationary frame placed in front of the movable board andsupporting one limb of the spring F.

Stretched between the frame G and the front D and over the edge of themovable board C is arubber or otherimpervious cloth II. This cloth isstretched between its supports so that when the atmosphere acts to forceit against the part 0 it will form a tight joint therewith and preventthe escape of the air then in the exhauster, and this will be thecondition of things during the down stroke of the treadle and theconsequent forward movement of the board C. The moment however the boardC is reversed, the internal pressure upon the cloth overcomes theexternal pressure and lifts it away from the edge of the board C andgives vent to the air in the exhauster. By this construction the forwardmovement of the exhauster board 0 is rendered easy, the resistancecaused by the friction between the cloth and the board being much lessthan the resistance heretofore encountered from the folding sides on theold exhauster. I also avoid by my improvement the necessity of providingany valves whatever in the board C. Furthermore the capacity of theexhauster is increased, as no part of the cloth sides enters or islocated between the boards.

I claim- 1. The exhauster for organ bellows provided with theiinpervionscloth sides stretched over of an exhauster consisting of the valvelessto the edge of the movable front board, snbstanboard 0 and theimpervious cloth H secured tially as specified. to the front of thebellows and toa stationary 2. The combination in an exhauster withsupport located in front of the board C, sub- 5 the movable board 0thereof, of the imperstantially as specified.

vious cloth H covering the sides of the 6X- FREDERIOK XV. I-IEDGELAND.hamster, and supports for such cloth, substair lVitn esses: tially asspecified. H. M. MUNDAY,

3. The combination With an organ bellows LEW. E. CURTIS.

